diff options
Diffstat (limited to 'memrchr.c')
-rw-r--r-- | memrchr.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/memrchr.c b/memrchr.c new file mode 100644 index 0000000..0460a93 --- /dev/null +++ b/memrchr.c @@ -0,0 +1,43 @@ +/* + * This file is part of libESMTP, a library for submission of RFC 2822 + * formatted electronic mail messages using the SMTP protocol described + * in RFC 2821. + * + * Copyright (C) 2004 Brian Stafford <brian@stafford.uklinux.net> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif +#undef HAVE_MEMRCHR +#undef _GNU_SOURCE +#undef _ISOC9X_SOURCE +#undef _OSF_SOURCE +#undef _XOPEN_SOURCE +#undef __EXTENSIONS__ +#include <missing.h> + +void * +memrchr (const void *a, int c, size_t len) +{ + const unsigned char *p = a; + + for (p += len - 1; (const void *) p >= a; p--) + if (*p == c) + return (void *) p; + return (void *) 0; +} |